CVE-2026-17251: CWE-476 NULL pointer dereference in TP-Link Systems Inc. TL-MR6400 v7.0
Description
A NULL pointer dereference vulnerability exists in the HTTP request parsing functionality of TL-MR6400 v7. An unauthenticated remote attacker can trigger the vulnerability by sending a specially crafted HTTP request containing a malformed session cookie header. Successful exploitation may cause the HTTP service process to crash, resulting in a denial-of-service condition and temporary loss of management or CGI functionality until service recovery.
CVSS v4.0
Score 7.1high
Affected software
TP-Link Systems Inc.
TL-MR6400 v7.0
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-476) exists in TP-Link TL-MR6400 v7.0's HTTP request parsing, where a malformed session cookie header triggers a NULL pointer dereference. This causes the HTTP service process to crash, resulting in denial-of-service conditions. The vulnerability can be exploited remotely without authentication by sending a crafted HTTP request. There is no vendor advisory or patch information available, and no known exploits in the wild have been reported.
Potential Impact
Exploitation results in a denial-of-service condition by crashing the HTTP service process, causing temporary loss of device management and CGI functionality until the service recovers. This impacts availability but does not indicate compromise of confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider limiting access to the device's HTTP management interface to trusted networks to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-07-24T22:03:11.872Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a888a87acd9273b4977388d
Added to database: 08/21/2026, 17:27:35 UTC
Last enriched: 08/21/2026, 17:37:09 UTC
Last updated: 10/05/2026, 18:48:17 UTC
Views: 62
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